https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92673
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Jürgen Reuter from comment #2) > (In reply to Richard Biener from comment #1) > > Try -fcommon, it's default recently was swapped to -fno-common. > > The default for gcc was changed? Which commit was this? I cannot find any > reference in the ChangeLog. https://gcc.gnu.org/ml/gcc-cvs/2019-11/msg00825.html